Prefabricated Concrete House with Large Flat Floor
Prefabricated concrete houses with large flat floors are characterized by fast construction speed, reliable structural quality, diverse prices, limited earthquake resistance but strong environmental adaptability.
In terms of construction speed: Prefabricated concrete houses with large flat floors have a significant advantage in construction speed. Some companies claim that the main structure of a 200-square-meter prefabricated concrete house with a large flat floor can be built in as fast as 4 hours. From the completed rough house to the owner's own decoration, it takes about a month. At a construction site in Qixian, Henan, the main structure of a three-story villa with an area of 200 square meters can be installed in 4 hours, and a 100-square-meter house can be ready for occupancy in just 5 days from an empty lot. This is due to the fully mechanized factory prefabrication process. The production cycle of a single module is only 7 days, with an error controlled within 2 millimeters. After being transported to the construction site and lifted into place, it is installed with the help of an intelligent positioning system, greatly shortening the construction time.
In terms of structure and quality: The main structure adopts a reinforced concrete structure, and the modules are prefabricated in the factory, ensuring quality. The modules themselves have no durability issues. For example, using C35 concrete + Φ14 deformed steel bars, the reinforcement ratio of a single module reaches 1.2%, with a wall thickness of 200 mm and a compressive strength of 30 MPa, equivalent to being able to withstand a weight of 3000 tons per square meter. The modules are combined through pre-stressed bolts (with a tensile strength of 25 tons) and the mortise-and-tenon structure of ancient-style buildings. In the Wenchuan earthquake simulation test, under a 9-degree intensity earthquake, the overall displacement was only 3 cm, and the quality guarantee period of some houses can reach about 70 years.
In terms of price: Prices vary by region and brand. There are options at 300 yuan per square meter, as well as 350 yuan per square meter (new prefabricated concrete houses in Zhumadian, Henan), 260 yuan per square meter (concrete prefabricated panel houses in Tang County, Baoding, Hebei), and 650 yuan per square meter (reinforced concrete prefabricated civilian houses for temporary construction housing in Hanzhong, Shaanxi), among other quotes.
In terms of earthquake resistance: Compared with cast-in-place houses, their earthquake resistance is slightly inferior. They can meet the requirements in non-seismic zones but should not be built with too many floors; otherwise, it is difficult to meet the seismic design requirements of building structures.
In terms of other characteristics: They have strong overall environmental adaptability, equipped with an intelligent integrated system. The walls are embedded with EPS insulation layers, saving 50% on heating costs in winter. The roof is reserved with interfaces for photovoltaic panels, and a 200-square-meter house can generate up to 3000 kWh of electricity per year, meeting the household electricity demand. In a typhoon test in Yangjiang, Guangdong, it withstood a 12-level typhoon, with no脱落 (should be '脱落' corrected to 'detachment' in proper context, here kept as is for literal translation demonstration, actual should be 'no tiles falling off') of exterior wall tiles and a门窗变形量 (window and door deformation) of less than 1 mm.
